And now the experts are being driven to tears by the lack of commitment by our leaders.

For the second week in a row, John Conmy missed his target weight-loss, dropping only 2 1/2lbs instead of the 4lbs they had hoped.

And dietician Aoife Hearne is not happy.

She told him: “I have been tough on you from week one because I felt you were talking the talk and not really putting it into action.

"I have to be honest with you -, I can’t believe that you are following the plan when I see a woman half your weight and older than you losing the same amount of weight as you, two weeks in a row,” Aoife said, referring to Noeleen Lynam who has been bang on target.

John insisted he stuck with the plan saying: “This week was bang on the button. I thought last week was bang on the button.

"It was only when I went home Monday night and Evonne [his wife] sat down and she went through everything and there was one or two meals that were swapped around but this week was bang on the button. Everything”.

But Aoife, who earlier in the series told John that she was disappointed and “p****d off” to see his wife cooking his meals, told him that viewers haven’t yet seen a “new John”.

She said: "I don’t believe there has been any change, to be honest.

"There are people round the country who are looking up to you as their leader and if I was sitting at home watching you now, I’d be like ‘what is he doing, like seriously, what is he doing?’.”

John said he felt bad for them but also for himself and at that moment Aoife welled up, telling the leader he must change himself as no-one else can do this for him.

“It is within your control John, that’s the thing,” Aoife said, with tears in her eyes.

“Other people watching TV can’t change you. You can change you.

"I saw this week how much Evonne wants you to change but, no matter how much she wants it, she can’t do it for you.

"I could see it, she just wants it so much, for you , for her, for your family as a unit, for your daughter.

"It is heartbreaking to see that you got this opportunity and you are not grasping it."

John still insisted he tried his best so Aoife promises to have a look again at the plan to see where the experts can help him get the results he wants.

Afterwards John said: “I can’t see where I can work harder, to be honest.

"I follow the meal plan. The only thing, maybe the breakfast is a too late in the morning, things are running a bit late that way. I don’t know."

Do you think John is slacking? Let us know in our comments section below